Silverline 9" Expert Ratchet Crimping Tool for Insulated Connectors, 148604 Hardened and tempered steel jaws Force amplifying ratchet mechanism for reduced hand fatigue, ideal for repeated crimping Hardened and tempered steel jaws All steel construction for long life Comfortable vinyl grip handles Capacity: 0.5mm - 1.0mm Red 1.5mm - 2.5mm Blue 4.0mm - 6.0mm Yellow